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COMBINED ELECTRIC R AND BLOWER. No. 411.030. Patented Sept. 1'7, '1889.

UNITED STATES PATENT OFFICE.

CHARLES J. HIRLIMANN, OF FORT LEE, NElV JERSEY.

COMBINED IELECTRIC MOTOR PND BLOWER.

SPECIFICATION forming part of Letters Patent No. 411,030, datedSeptember 17, 1889.

Application filed May 6, 1889. Serial No. 309,696. '(No model.)

ful Improvements in a Combined Electric Motor and Blower, of which thefollowing is a specification.

My invention `relates to the application of an electric motor to ablower, the two inachines being combined in a single structure.

My object is to provide an apparatus of this kind which shall be verycheap as an article of manufacture and suiiiciently eicient in operationfor all practical purposes.

In myimproved apparatus the armature of the motor is formed of a woodenwheel having attached to each side of it a number of soft-iron stripsconstituting the armature or armatures proper. In the periphery of thewooden wheel the fans or blades of the blower are placed. Thefield-magnets of the motor are four in number, although I do not limitmyself to this number, and they are located two each side of thearmature. The whole structure is placed within the blower-casing, and isthus protected from injury through external agents or causes.

The particular construction will now be described with reference to theaccompanying drawings, in which- Figure 1 represents a section taken atright auglesto the motor-shaft and at one side of the armature. Fig. 2represents a section of the casing, showing an elevation of the machine;and Fig. 3, a detailed view of one of the fanblades. Fig. 4 is a detailsectional view taken through one end of the commutator.

The whole apparatus is mounted upon two standards A A, which may beformed of wood or other suitable material. The upper part of thestandards is circular in shape and provided with a central opening a,through which air may pass to the interior. Upon the adja cent faces ofthe standards an iron strip a is secured. The strips are in length aboutequal tothe diameter of the circular portion of the tandards, and theyextend across the openog in said standards, as shown. rIhe shaft of earmature has its bearingsin the two strips a', and is concentric withthe circular portion of lChe standards..

The armature consists of t-he wheelB, made of wood, brass, or anynon-magnetic material. I prefer, however, to makeit of brass. Upon eachside of the wheel I attach strips of soft iron b b. These strips serveas the armature.

Thefeld-magnets of the motor are represented by C C; I have shown four,but itis obvious that I 'could use eight or any other number, and placethem in radial lines around the armature-shaft with. their pole-piecesnext to the armature.

The commutator is represented by D. It is a solid hub of metal and isprovided with a number of teeth d. One of the brushes E bears upon theseteeth, while the brush E bears upon the smooth portion of thecommutator. The number of teeth corresponds with the number of armaturesections or strips. The field-magnets are wound in direct series. Oneterminal of the circuit, after passing around the magnets, goes to onebrush while the other terminal goes directly to the other brush. Vhenthe current is turned on, each of the iron stripsl b on the armature isattracted by the poles of` the field-magnets. lVhen the armature isrotated to a point where the strip of the armature coincides with thepole-piece of the magnets, the brush E drops oit of one of the teeth onthe commutator, thus breaking the circuit and allowing the momentum ofthe Wheel to carry it on until the circuit is again completed by thebrush striking the next tooth. This is a si1nple and well-known form ofmotor. It is, however, particularly adapted for my purposes, because itadmits of an easy attachment or adjustment of the fan-blades F. Theseblades I make of wood or other suitable material and provide them withpins f, which fit into sockets in the periphery of the armature-wheel.

I have thus described a very simple form of electric motor and blowercombined, and it will be seen that the principal object of theinvention, that of cheapness of manufacture, is attained. The blower boxor casing (represented by G) is made of sheet metal and it ts down overthe whole apparatus, thus pro- IOC ssr Avait/iste c@ tecting it frominjury. Thcsidcs of thc casing are'formed with openings which coincidewith the openings in the standards A A, and the blast is driven throughoutlet g, which may be connected with a line of tubing, a whistle, orany other similar apparatus in usual manner.

I have designed this apparatus particularly for use in subways toprevent the accumulation of gases therein. I contemplate locating theblowers at intervals in the subway and connecting them electrically witha supplyconductor and keeping them running Having thus described myinvention, I

claiml. In a combined electric motor and blower,

the armature of the motor formed of a nonmagnetic wheel having ironstrips or armatures pla-ced on each side thereof, in combination withthe fan-blades attached direct to the periphery of the wheel. l

2. The combination, with an electric motor and blower combined, of twostandards, as A A, in which said motor and blower are mounted,air-passages through vsaid standards, and a blower-casing inclosng thewhole structure and provided with air-*passages corresponding with theair-passages in the standards, substantially as described.

In witness whereof I have hereunto signed my name in the presence of twosubscribing Witnesses.

CHARLES J. HIRLIMANN. Vitnesses:

WM. A. ROSENBA'UM, F. C. GRUERY.

